Year	US Dollars adjusted for inflation)
1950	2610
1951	2622
1952	2746
1953	2882
1954	2884
1955	2944
1956	3005
1957	3047
1958	3032
1959	3041
1960	2979
1961	2975
1962	3209
1963	3226
1964	3350
1965	3465
1966	3588
1967	3678
1968	3692
1969	3696
1970	3701
1971	3693
1972	3830
1973	3932
1974	3988
1975	4144
1976	4281
1977	4370
1978	4508
1979	4289
1980	3994
1981	3774
1982	3653
1983	3610
1984	3671
1985	3738
1986	3707
1987	3721
1988	3709
1989	3660
1990	3718
1991	3762
1992	3921
1993	4111
1994	4269
1995	4472
1996	4532
1997	4611
1998	4631
1999	4709
2000	4732
2001	4744
2002	4769
2003	4752